It was a commodity people were willing to pay for.
Metal
metal
The slavery trade operated and prospered because it was profitable.
The fur trade was the first profitable industry for the French in Canada.
Triangular Trade
Yielding or bringing profit or gain; gainful; lucrative; useful; helpful; advantageous; beneficial; as, a profitable trade; profitable business; a profitable study or profession.
Profitable trade.
buying Narcotics from Afghanistan.....
METAL
Armaments
triangular trade
because it was a very profitable business